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Liquid crystal composition and liquid crystal display device

Inactive Publication Date: 2020-06-04
DAINIPPON INK & CHEM INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

This patent describes a new liquid crystal composition that has several beneficial qualities. It has a negative Δε, a large refractive index anisotropy (Δn), and is high in TNI and low in TCN. It also has low γ1 and a large K3 33. Using this liquid crystal composition, the patent claims that it can be used to create display devices that have high response speed, high VHR, and excellent low-temperature storage stability, with no or very few display defects. These devices are suitable for use in various applications such as cell phones, tablets, and televisions.

Problems solved by technology

However, the improvement cannot be said satisfactory.

Method used

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  • Liquid crystal composition and liquid crystal display device
  • Liquid crystal composition and liquid crystal display device
  • Liquid crystal composition and liquid crystal display device

Examples

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examples

[0169]The present invention is described in further detail below by giving examples, but the present invention is not limited to these examples. In a composition of each of examples and comparative examples, “%” represents “% by mass”. In the examples, compounds are described by using the following abbreviations.

[0170](Side Chain)

[0171]-n —CnH2n+1 a linear alkyl group having n carbon atoms

[0172]n- CH2n+1— a linear alkyl group having n carbon atoms

[0173]—On —OCnH2n+1 a linear alkoxy group having n carbon atoms

[0174]nO— CnH2n+1O— a linear alkoxy group having n carbon atoms

[0175]—V —CH═CH2

[0176]V— CH2═CH—

[0177]—V——CH═CH—

[0178]—V1 —CH═CH—CH3

[0179]1V— CH3—CH═CH—

[0180]—F —F

[0181]—OCF3 —OCF3

[0182](Linking Group)

[0183]—CF2O——CF2—O—

[0184]—OCF2- —O—CF2—

[0185]-1O——CH2—O—

[0186]—O1- —O—CH2—

[0187]-2- —CH2—CH2—

[0188]—COO——COO—

[0189]- single bond

[0190]—OCO——OCO—

[0191](Ring Structure)

[0192]In the examples, the measured characteristics are as follows.

[0193]TNI=: nematic phase-isotopic liquid phase...

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Abstract

A problem to be solved by the present invention is to provide a liquid crystal composition having negative dielectric anisotropy (Δε), large refractive index anisotropy (Δn), a high nematic phase-isotopic liquid phase transition temperature (TNI), a low solid phase-nematic phase transition temperature (TCN), sufficiently low rotational viscosity (γ1), and large elastic constant (K33), and also to provide a VA-mode, FFS-mode, or IPS-mode liquid crystal display device using the liquid crystal composition, satisfying a high response speed, high VHR, and excellent low-temperature storage stability, and having no or very few display defects. According to the liquid crystal composition of the present invention, the problem is solved by a liquid crystal composition containing compounds represented by general formula (S1), general formula (S2), and general formula (S3).

Description

TECHNICAL FIELD[0001]The present invention relates to a liquid crystal composition and a liquid crystal display device using the same.BACKGROUND ART[0002]Liquid crystal display devices are used for watches and electronic calculators, various household electric appliances, industrial measuring apparatuses, automotive panels, cellular phones, smartphones, notebook PC, tablet PC, televisions, etc. Typical examples of a liquid crystal display mode include a TN (twisted nematic) mode, a STN (super twisted nematic) mode, a GH (guest-host) mode, an IPS (in-plane switching) mode, a FFS (fringe field switching) mode, an OCB (optically compensated birefringence) mode, an ECB (electrically controlled birefringence) mode, a VA (vertical alignment) mode, a CSH (color super-homeotropic) mode, a FLC (ferroelectric liquid crystal) mode, and the like. Examples of a driving method include static driving, multiplex driving, a simple matrix method, and an active matrix (AM) method of driving by using T...

Claims

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Application Information

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IPC IPC(8): C09K19/30
CPCG02F1/1362C09K2019/0448C09K19/3066C09K19/12C09K19/14C09K19/16C09K19/18C09K19/20C09K19/30C09K19/42C09K2019/3004C09K2019/3009C09K2019/301C09K2019/3027C09K2019/122C09K2019/123C09K2019/3016G02F1/13712C09K19/3003G02F1/13
Inventor SUDO, GOOHISHI, HARUKITANIGUCHI, SHIROUKURISAWA, KAZUKI
Owner DAINIPPON INK & CHEM INC
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